Precision-saw.



C. L. PARTRIDGE.

PRECISION SAW.

APPLICATION FILED MAY 8. \911.

Patented Nov. 5, 1918 C. L PARTR'IDGE.

\PRECISION SAW.

APPLICATION FlLED MAY 8. 19);.

Patel lted Nov. 5, 1918. 3 SHEETS-SHEET 2 l l I m: noun urn-s m. mmzmm. Iunnncmn. a c

' C. L. PARTRIDGE.

PRECISION SAW.

APPLICATION man MAY 8. 1911.

1 283,55 1 Patented Nov. 5, 1918*.

3 SHEETS-SHEET 3- FEQG CHARLES, Ljrnnrarnengor OMAHA, NEBRASKA.

" rnEcIsIoiv-sAW. A I

i To all cvkom it may concern: 7

Be it known that I, CHABLnsli. PAR- (BRIDGE, acitizen of the United States, residwing at Omaha, inthe county ofDouglas and 'suchusel V The invention has State of Nebraska, have invented certain new and useful Improvements in Precision- Saws; and I do hereby declare thefollowing to be a full, clear, and exact description of skilled in the art to-whichit appertains to This invention relates to improvements in saws of the type ordinarily used for cutting slugs of metal for printing oflices, although the invention is not necessarily limited to cling rotary saw and an adjustable support for the carriage of thesaw to permit the latter to be fed intothe work.

I ported by and adjustable withthe Vertically Another object is the provision of a saw "1 with the driving means forthesaw.

With these and other objects in view, the

l combination and arrangement of partsfas will be hereinafter specifically described. claimed-and illustrated in the accompanying drawings, in which: l

' "Figure 1 represents a front elevation,

"partly in sectiom'of the improved saw, a

sawing machine,

i Fig. 'represents an elevation of the opposite end of the saw,

Fig. 4 represents a top plan view of the i l neoted with the post and the hook is enmachine.

: -Fig. 5 represents a detail sectionalview Fig. 7 'represents a'bottom' plan viewsof the mltermg cutter carriage-removed,

g p esents adetai lsectional view on theline66 of Fig.1,y

Fig. 8 represents a fragmentarygside' elevation of one of the legs of the machine,"

; Fig. 9 represents-a detail view of the gear shifting device; 1

' irate" corresponding parts throughout the p Specification of Letters Patent. I

at its object to pa- "vide an improved machine including a travaten ted Nov. 5, v1918.

11 supporting a bed plate 12. A sub-base 13' is adjustably supported upon the bolts 14 fastened to the base plate 10 and supports a an electric motor 15 to provide power to operate-the machine. A track 16 is securedbybracket arms 17 to one leg 11.0f thesup- *porting frame' structure and slidably supthe sawarbor 20, The saw 21 is secured to the-inner terminal of the arbor 20 and is movable back and forth transversely of the bed plate 12. I V

An inclinedboard 5 is arranged under-, 'ne'ath the saw 21 for guidlng the sawdust r onto a second board 6*, whi'chis so arranged as to deflect the dust away fromthe sawing machine. v

A belt, or other 7 vice 22; is extended over the pulley 23' of the motor" shaft 24 and extends upwardly ing machine including a mitering'mill suppower transmitting vdeover a pnlleysecured to the saw arbor 2O 1' for driving the latter during operation of the maehine,'and an idler pulley25 is provlded to takeup the slack in the belt 22 in-:

c'ident to; the movement ofthe carriage across the bed plate 12; I

A table 25 is arranged on the right side of the saw 21 and is pivotally supported on a hinge -r0d 276, which extends through ap er-"' tured ears 27 depending 'fromthe table 25 and apertured ears 28fformed-on the bed plate 12. a I :Fig. '2 represents an end elevation of the vertically adjustable table 29 is arranged on the leftside of the saw 21, andis "support-ed upon a standard or post 30, which extends down through the bed plate 12 and iss'upp'ortedinguidesQZLf A hook 32 is congaged byia link 33, which is connected with i acrank 84 onashaft 35, which latter'is provided at, its forward terminal with a handle 36, whereby the shaft may be conveniently rocked to'o'scillate the crank 3 1 and elevate or lower'the post' 30 and table'29, as desired. V

By proper vertical adjustment'ofqthe table 29,'the work'may' be brought into proper:reflation to the saw 21 to insure the most efficient cutting action-of the latjtera- A head gage 37 is formed'on: the front a; portion of. the table 29 and isprefera'bly provided with pica or other standard measi uremegntsdesigned to assist in accuratelyadseveral views, the numeral 10 indicates a supporting base carryingupetimcling legs;

justing the side gage 38', which is slidably is held or clamped in engagement with the heady gage 37 by a. clamping member 39, which is operable by a screw carrying a knob 40 for convenience in adjusting the clamping member. The specific construction of the adjusting means for the clamping member 39 is described and clalmed in another application for patent.

An. auxiliary head gage 41 is secured upon the table top 29 rearwardly of the main gage 37 and slidably supports an auxiliary side gage 42. At the inner terminal of the auxiliary gage 41 a slot 43 is formed in the table top 2-9 and the walls of the slot are enlarged and grooved to provide guides for a carriage 44, which is slidably mounted therein.

The carriage 44 supports a vertically disposed shaft 45, carrying a pulley 46 at its lower end and a rotary cutting element 47 at its upper end, having inclined teeth or cutting members designed to miter or bevel the edges of a metal slug. The cutting element 47 is secured in position upon the shaft by a thumb screw 48 and the carriage is moved longitudinally in the groove 43 by an adjusting oractuating member 49, including a vertically disposed shaft ournaled in the table 29 carrying a handle 51 at its upper terminal, and an angularly disposed crank arm 52 at its lower terminal. A pin 53 is formed integral with the outer terminal of the arm 52 and is engaged in a slot 54 formed in the carriage 44, whereby the latter is adjusted longitudinally in the slot 43 during swinging movement of the handle 51 to move the cutting element 47 across the work engaged with the head gage 41.

Rotary movement is imparted to the rotary cutting element 47 from the motor shaft 24 by a belt 55, or other power transmitting device, which is extended over the pulley 46, idler pulleys 56 arranged under the table 29 and also over a pulley 57 secured upon a vertically disposed shaft 58. The shaft 58 is swivelly mounted at its upper terminal. in. a bearing 59 secured under the table top 29 and is supported at its lower terminal in a bearing member 60, pivotally mounted in inwardly directed pins 61 carried by curved supporting arms 62, which latter are pivotally mounted at their lower terminals on a bolt 63 secured to an outwardly directed lug 64 formed upon a vertically adjustable plate 65. A friction pulley 66 is slidably mounted upon the shaft 58 above the bearing member 60 and is engaged with a friction disk 67 secured upon the adjacent terminal of the motor shaft 24, whereby when 'the disks are moved into frictional engagement rotary movement is transmitted from the shaft :24 to the shaft 58. A pulley 58 is mounted upon the shaft 58 a short distance below the bearing 59. The plate 65 is secured in adjusted position by bolts 68 positioned through slots 69 in the plate and threaded in the adjacent supporting leg 11 of the sawing machine.

By swinging the pivoted arms upon their pivotal axis 63, the friction disk 66 is moved into and out of engagement with the friction disk 67 at the will of the operator, and the adjustment of the pivoted arms is effected by an eccentric 70 rotatably mounted in the leg 11 under the bed plate 12 and connected with an eccentric strap 71, carried by a rod 7 2 which latter is connected at its lower terminal with a laterally projecting ear 73 formed on the arms 62. By shifting the eccentric 70 from one position to another the arms 62 are moved inwardly and outwardly with relation to the friction disk67. A handle 72 is connected with the shaft carrying the eccentric 70 for convenience in adjusting the latter and is movable against pins 73 formed integral with the leg 11 and constituting stops for limiting the swinging movement of the handle 72.

What 1 claim is:

1. In a sawing machine, a bed plate, a vertically adjustable table, a post carried by the table, a pivoted handle and a link and arm in connection between the post and the handle for adjusting the table.

2. In a sawing machine, a bed plate, a vertically adjustable table, a post carried by the table and extending through the bed plate, a crank shaft, a handle carried by the crank shaft, and means connecting the crank pin of the shaft with the post to adjust the latter vertically.

8. In a sawing machine, a supporting frame, a vertically adjustable table arranged above the supporting frame, a rotary cutting element supported upon the table, a shaft swivelly mounted underneath the table, means connecting the shaft with the rotary cutting element, a drive shaft rotatably mounted in the frame, driving connections between the first and second mentioned shafts, and means for swinging the firstmentioned shaft out of driving engagement with the second-mentioned shaft.

4. In a sawing machine, a supporting frame, a table arranged over the frame, means for adjusting the table vertically, a circular saw arranged laterally of the table, a rotary cutting element supported by the table and having its axis arranged at rightangles to the axis of the saw, and means for driving the cutting element.

5. In a sawing machine, a table, a supporting frame therefor, a rotary cutting element mounted upon the table, a shaft pivotally and rotatably supported by the table, means connecting the shaft with the cutting element, a drive shaft, a friction disk carried by the drive shaft, a friction disk carried by the lower terminal of the first-mentioned shaft, and means for swinging the lower terminal of the first-mentioned shaft inwardly to engage its friction disk with the friction disk of the drive shaft.

6. In a sawing machine, a supporting table, a rotary saw arranged laterally of said table, a rotary cutting element supported by said table and having its axis arranged at right angles to the axis of the saw, a drive shaft, means for adjusting said table vertically and flexible guiding connections between the drive shaft and the rotary cutting element permitting vertical movement of the table. 7

7. In a sawing machine, a supporting frame, a table mounted thereon, arotary saw arranged laterally of said table, and a rotary cutting element mounted upon the table and having its axis arranged at right angles to the axis of the saw. 7

8. In a sawing machine, a supporting frame, a table mounted thereon, a rotary saw arranged laterally of said table, a rotary cutting element, means movabl'y supporting the rotary cutting element upon the table and permitting movement thereof in the di rection of the cut of the rotary saw. a

9. In a sawing machine, a supporting frame, a table mounted thereon, a rotary saw arranged laterally of said table, a rotary cutting element, means movably supporting the rotary cutting element upon the table and permitting movement thereof in the direction of the cut of the rotary saw, said cutting element having its cutting surface beveled to miter the edges of. material cut by said saw.

10. In a sawing machine, a bed plate, a vertically adjustable table, a post carried by the table and extending through the bed plate, a crank shaft, a handle carried by said crank shaft, means connecting the crank pin of the shaft with said post to adjust the post and table vertically, a rotary saw arranged laterally of said table, a rotary cutting element, means movably supporting the rotary cutting element upon the table and permitting movement of the cutting element in thedirection of the cut of the rotary saw.

11. In a sawing machine, a supporting frame, a vertically adjustable table arranged above the supporting frame, a post carried by the table, a pivoted handle, a link and arm connection between the post and the handle for adjusting the table, a rotary cutting element supported upon the table, a shaft swivelly mounted beneath the table, means connecting the shaft with the rotary cutting element, a drive shaft rotatably mounted in the frame, driving connections between the first and second mentioned shafts, means for swinging the first mentioned shaft out of driving engagement with the second mentioned shaft, a rotary saw ar ranged laterally of said table, said cutting element having its cutting surface beveled to miter the edges of material cut by said saw.

In testimony whereof I afiix my signature in presence of two witnesses.

, CHARLES L. PARTRIDGE.

Witnesses:

H. EARL SHAW, V FREDERICK F. FARMER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Batents.

' Washington, D. 0. 

